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How to switch from PCIE 3.0 to 2.0???

Last response: in Graphics & Displays
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June 19, 2012 7:56:23 PM

Can someone more knowledgeable than me please explain this from start to finish?

More about : switch pcie

a c 103 U Graphics card
June 19, 2012 8:11:28 PM

PCIE 3.0 is only available with third gen i series or ivy bridge cpus......once you have an ivy bridge cpu installed I think it automatically switches your pcie lanes to 3.0 if not there should be a setting in the bios to change it. if you have a second gen i series cpu (sandy bridge) you will not be able to have pcie 3.0. edit: just realized you wanted to go from 3 back to 2....why would you want to do this? any pcie 2.0 card will work perfectly fine in a 3.0 slot same goes for pcie 1.0 or whatever that was (too long ago)
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June 19, 2012 8:11:37 PM

skiim said:
Can someone more knowledgeable than me please explain this from start to finish?


There is no need to manually switch the pci-e lanes from 3.0 to 2.0. If you use a pic-e 2.0 card in a 3.0 slot it will still work and will simply run at its highest 2.0 speeds. You can also use a pci-e 3.0 card in a 2.0 slot as well. The 3.0 card will simply run as fast as the 2.0 lane allows.
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a c 563 U Graphics card
June 19, 2012 8:14:42 PM

You need a motherboard that supports PCIe 3.0, an Ivy Bridge CPU and a PCIe 3.0 card if you want full PCIe 3.0 support.
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June 19, 2012 8:20:30 PM

ko888 said:
You need a motherboard that supports PCIe 3.0, an Ivy Bridge CPU and a PCIe 3.0 card if you want full PCIe 3.0 support.


the X79 (Socket 2011) Motherboards also support 3.0 support
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a c 563 U Graphics card
June 19, 2012 8:24:29 PM

jerubedo said:
the X79 (Socket 2011) Motherboards also support 3.0 support

When did I ever say it didn't?
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June 19, 2012 8:24:57 PM

I want to do this because I have a recall version of gtx 670. While I wait for my replacement, the temp fix is to adjust the pci bus speed to Gen 2. I have an asus z77 v-pro, ivy bridge cpu
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June 19, 2012 8:29:03 PM

so basically I just need to know how to revert back to pci 2.0 As long as I can revert back once my new card arrives, I just need what I asked for.
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June 19, 2012 8:30:21 PM

skiim said:
so basically I just need to know how to revert back to pci 2.0 As long as I can revert back once my new card arrives, I just need what I asked for.



See my above answer:

There is no need to manually switch the pci-e lanes from 3.0 to 2.0. If you use a pic-e 2.0 card in a 3.0 slot it will still work and will simply run at its highest 2.0 speeds. You can also use a pci-e 3.0 card in a 2.0 slot as well. The 3.0 card will simply run as fast as the 2.0 lane allows.
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June 19, 2012 8:30:47 PM

And for everyone answering before reading the posts or misreading the subject, I am trying to revert from 3.0 to 2.0. I have 3.0 now, and want to revert back to 2.0
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June 19, 2012 8:31:43 PM

Jeru it is the only fix I can find for my gpu problem. its only tempororay. is it possible or no?
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June 19, 2012 8:34:19 PM

Okay I am going to do a recap here.

My EVGA GTX 670 Superclocked is a recall model. I am waiting for a new replacement to come, but in the meantime, the fix for the card to stop crashing 2 mins into any game, is to revert your pcie speeds to 3.0 from 2.0. I dont really even know what this entails, but that is the reason. I will switch back when my new card comes...
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June 19, 2012 8:37:15 PM

skiim said:
Okay I am going to do a recap here.

My EVGA GTX 670 Superclocked is a recall model. I am waiting for a new replacement to come, but in the meantime, the fix for the card to stop crashing 2 mins into any game, is to revert your pcie speeds to 3.0 from 2.0. I dont really even know what this entails, but that is the reason. I will switch back when my new card comes...


Most of the motherboards do NOT have the option in the bios to manually adjust the generation used on the pci-e lanes, and that is because the configuration is dynamic. Plugging in a 2.0 card will have the lane run at 2.0 speeds, while a 3.0 card will have the lane run at 3.0 speeds. On the off chance your bios does have the option, though, it would be in the on-board periphrials section, and look for pci-e, then if it has the option, switch fron gen 3 to gen 2.
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a c 563 U Graphics card
June 19, 2012 8:46:22 PM

skiim said:
Okay I am going to do a recap here.

My EVGA GTX 670 Superclocked is a recall model. I am waiting for a new replacement to come, but in the meantime, the fix for the card to stop crashing 2 mins into any game, is to revert your pcie speeds to 3.0 from 2.0. I dont really even know what this entails, but that is the reason. I will switch back when my new card comes...

In the UEFI's Advanced tab page look at the NB PCIe Configuration settings.

You can change the PCIEX16_1 and PCIEX16_2 Link Speeds from Auto and lock them to Gen1 or Gen2.

Page 3-21 of the ASUS P8Z77-V PRO user's manual (English).
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June 19, 2012 9:10:17 PM

Best answer selected by skiim.
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a c 273 U Graphics card
June 19, 2012 9:12:59 PM

This topic has been closed by Mousemonkey
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